Heater for use in the permanent waving of the hair



Sept. 4, 1934. KERKA 1,972,193

HEATER FOR USE IN THE PERMANENT WAVING OF THE HAIR Filed April 7, 1,953

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Inventor flda 'a by Fig 4 Attorney.

Patented Sept. 4, 1934 UNITED STATES HEATER FOR USE IN THE PERMANENT WAVING OF HAIR Francis Kerka,

London, England Application April 7, 1933, Serial No. 664,941 In Great Britain March 31, 1932 4 Claims.

This invention relates to heaters for use in the permanent waving of the hair, and especially to so-called sectional heaters that are adapted for treatment in the permanent waving of the newly grown part of the hair near the I ance wire is mounted, the unit thus provided being adapted to be secured beneath or upon an insulating fitting conveniently moulded of phenolformaldehyde products or of other similar thermal setting compositions. The insulating fitting may be provided with an upward extensionthrough which the leads and earthing wire are adapted to be upwardly passed and by which the unit may be suspended as usual. The insulating fitting at its upper part may be divided in a central plane and may be provided with a complementary part asa cover plate adapted for ready removal for exposing the part of the con duits or channels in the fitting in which the leads are laid, the flex advantageously passing out at the upper end of the fitting through a hole partly formed in the mainpart of the fitting and partly within the cover plate.

The invention comprises the constructional features hereinafter described.

The invention is illustrated in the accompanying drawing by way of example.

Figure 1 is a sectional elevation of a heater according to the invention.

Figure 2 is a cross-section on the line 2-2 of .s Figure 1.

\ 3, the heater unit is provided with a substantially completely closed cylindrical casing tapering towards its lower end and formed by an inner tube a of uniform diameter surrounded by a tubular jacket b, an annular space being provided between the inner tube and the jacket in which the electric resistance wire 0 is conveniently applied on an insulating layer it surrounding the inner tube a; and at the upper end the casing may be closed by an annular cap e to which the jacket b is secured by screws b the parts otherwise being connected together by soldered, screwthreaded or other joints to form a completely closed casing. Such a unit is adapted for connection at its upper end to the insulating holder or fitting 1, usually provided in such units of an insulating composition, and formed as a ring f with an integral upwardly and outwardly extending part I through which the leads pass, wherebythe unit may be suspended by the leads used. The heater unit is advantageously secured on the underface of the fitting by such means as screws which may be engaged with screw-threaded holes 6 disposed in diametrically opposite positions, or equi-distant, or by any other convenient means. The upstanding part i of the fitting is advantageously provided as a handle and is sufliciently massive for the conduits .or channels g g g within which the conductors may lie, to be formed therein, and the upstanding part'; of the fitting or its upper part is divided, in the manner hereinbefore described, in a plane passing centrally through the conduits or channels g 9 g for the middle portion of its width'and a cover plate is provided having in coincident position the parts of the conduits or channels g 9 9 formed in its underface. The cover plate is conveniently secured in position by such means as screws engaging holes f whereby the conduits or channels a 9 0 are completed for the enclosure of the heads h. The three channels or conduits g 9 9 provided in the upstanding part of the fitting extend to positions in the ring part c of the fitting adjacent the holes e e 6 through which the leads pass upwardly out of the annular cavity within the jacket b off the heater unit. The third channel 9 is provided for the earthing wire which is arranged in contact with the inner tube a. Towards the upper end of the fitting the conduits g 9 9 open into an enlarged central conduit or channel 9 partly formed in the part of the fitting and partly in the cover plate 1, and near the upper end the single conduit may be contracted and may have its surface roughened or milled tightly to clamp or engage the leads which are contained in a suitable common covering h and a rubber jacket 71. The insulating fitting at its base part or ring 3 is provided with a concentric hole of a diameter corresponding to the diameter of the inner tube a of the heater unit. A ring of packing may be applied between the insulating fitting and the heater unit.

The modified construction represented in Figures 4 and 5 has the heater unit provided with the ring or cap e of insulating material. The inner tube a is in this case suitably engaged in the inte-;

rior of the ring or cap and the latter is strengthened by means of a metal sleeve 6 The tubular jacket I) is also provided of insulating material. The upstanding part I of the insulating fitting f has an annular recess 9 formed intermediate the ends of the conduit or channel 9 in which may be engaged a bulge or swelling h of the rubber jacket b of the leads, formed by means of a tie or binding of string or wire upon the common covering h By such means the grip of the insulating fitting upon the leads is increased.

When desirable there may be mounted within the unit an additional inner tube 2 (Figure 6) having an external diameter corresponding to the bore of the inner tube a of the unit and adapted to have a sliding fit therein. At the upper or outer end this additional tube may be provided with an integral outwardly extending flange i which is adapted to be fitted within an annular recess within an external non-conducting ring that may be mounted at the upperend of the additional tube. By such means if it be desired to submit to treatment the whole tress of hair the additional tube may be inserted into the heater unit from the upper end. Thus heat may be transmitted to the additional inner tube by conduction and heat may thus be imparted to the upper part of a tress tightly wound upon'the curler. The non-conducting ring may be adapted to engage with a ledge a formed for the purpose in the inner face of the upstanding part f of the insulating fitting so that thus the additional tube may be set and supported in a definite position upon the ledge so formed, it being understood that the upstanding part of the fitting may not be vertically disposed but may recede outwardly as it rises. Thus at or about a middle position in the height of the upstanding part of the insulating fitting the ledge a may beformed by removing the material immediately above. Thus the ledge serves as a stop and support for the additional tube.

It will be understood that the heater unit may be provided of normal length adequate-for the treatment of a long tress of hair without the use of-an extended tube and that the constructional features may be varied without departing from the invention. Thus, in the construction in which the ring e is of insulating material, this may be provided integral with the insulating fitting.

I claim:

1. Heaters for use in the permanent waving of the hair, comprising an electric heater unit, a casing for said heater unit, said casing consisting of inner and outer tubular members joining at the one end and spaced apart at the other end, a ring fitting between said tubular members at their spaced ends, and an insulating support upon which said casing is carried by said ring, said insulating support having an upstanding handle portion provided with passages through which supply leads are threaded and said handle portion being divided into separable parts in the plane of the said passages.

2. Heaters for use in the permanent waving of the hair, comprising an electric heater unit, a casing for said heater unit, said casing consisting of inner and outer tubular members joining at the one end and spaced apart at the other end, and an insulating support having an annulus to be received between said tubular members at their spaced ends to close and support said casing, said insulating support having an upstanding handle portion provided with passages through which supply leads are threaded and said handle portion being divided into separable parts in the plane of the said passages. a

3. Heaters for use in the permanent waving of the hair, comprising a cylindrical electrical heater unit, a casing of annular form for the reception of said heater unit, an annular insulating support upon which said casing is carried, said insulating support having an upstanding handle portion provided with passages through which supply leads are threaded, and said handle portion being divided into separable parts in the plane of the said passages, and a removable inner tube for reception into the bore of thecasing, the saidtube being provided with an annular head and the said handle portion of the insulating support being provided with a seating upon which the head of the removable inner tube may rest when the tube is in position in the'bore of the casing.

4; Heaters for use in the permanent waving of the hair, according to claim 3, wherein the seating for the head of the removable inner tube is provided by the formation of a recess in the surface of the upstanding handle portion directed towards the axis of the heater, the said recess having the lower end formed as a surface in a 1 plane transverse to the axis of the heater.

FRANCIS KERKA.

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